20730768 has 20 divisors (see below), whose sum is σ = 53554608. Its totient is φ = 6910240.

The previous prime is 20730757. The next prime is 20730781. The reversal of 20730768 is 86703702.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215898 + ... + 215993.

Almost surely, 2^20730768 is an apocalyptic number.

It is an amenable number.

20730768 is an abundant number, since it is smaller than the sum of its proper divisors (32823840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20730768 is a wasteful number, since it uses less digits than its factorization.

20730768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431902 (or 431896 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 20730768 is about 4553.1053139588. The cubic root of 20730768 is about 274.7083100002.

The spelling of 20730768 in words is "twenty million, seven hundred thirty thousand, seven hundred sixty-eight".